![]() The proposed system has a DC-DC converter stage and an inverter stage. The proposed project will develop a novel inverter architecture for solar PV systems, which enables direct connection of the inverter to the Medium Voltage (MV) grid without any LFT. The LFT increases the size, volume and cost and decreases the efficiency of the system. The proposed inverters are usually used with a low frequency transformer (LFT) in order to connect to medium voltage grid. However, these studies are mainly focus on low voltage grid systems. Many studies have been presented on various inverter topologies and control algorithms to obtain high efficient, compact and cost effective inverter designs for grid-connected PV systems. Hardware design involves medium voltage medium frequency transformer design, heat transfer, and converter design, hardware prototype implementation and testing.Įxecutive Summaries GR-18-03: Highly Efficient and Compact Medium Voltage Solar PV Inverter- Necmi Altin Simulation studies is performed with Ansys-Maxwell for transformer design and MATLAB/Simulink for converter design. ![]() MV port has 4160 VAC grid compatible DC bus voltage level. The energy flow will be controlled by shifting the phase angles of the H bridge converter legs in PV, battery and MV ports. According to the this topology, desired ports can operate bidirectionally and they can share power consumption/production via regulating port voltage/current value. Thus, in addition to reducing cost, size and weight, galvanic isolation of each source is ensured, and control action can be implement with single controller. Different ports can use the same core even if their voltage levels are very different. The MV MPSST system consists of three low voltage ports and one medium voltage port that allows connection to the medium voltage grid without any additional step-up line frequency frequency transformer. This project proposes a Medium Voltage Multi-Port Solid State Transformer (MV MPSST) which combines four solid state transformers in one common transformer core. Also, connecting multiple sources to grid may requires one SSTs for each device and grid connection. In this case, it requires a step up/down transformer between the inverter and grid and design of the SST according to grid voltage level. The increase in power level may require an increase in system voltage level and connection to Medium Voltage (MV). This topology has superior advantages such as being compact, cost effectivness and galvanic isolation. Researchers have introduced high frequency and compact solid-state transformers (SSTs) instead of the bulky line frequency transformers for battery, wind and PV to grid application, and energy transmission systems. However, it brings several disadvantages including increased size, weight, cost and decreased power density. Many converter systems, which are connected to grid or special loads, contain a line frequency transformer (LFT) that provides some benefits such as galvanic isolation etc. GR-17-11: Medium Voltage Multi-Port Solid State Transformer Design and Implementation for Microgrids and Distribution Systems.- Saban Ozdemir
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |